I still 'believe' advertising doesn't work, but when I check out how much 'brand' stuff I own and consume I have to admit there is not much basis to my beliefs (this is probably true for most beliefs...).
It is true, I tried it at a bar once as an explicit tip of the hat to those funny commercials, and then found out I actually liked it. If not for those commercials I never would have tried it.
This campaign has done insane wonders for Dos Equis and the ads aren't about beer. They're about some old dude with a beard.